/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.http.client.reactive;

import java.net.HttpCookie;
import java.util.List;

import org.eclipse.jetty.reactive.client.ReactiveResponse;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;

import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseCookie;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

/**
 * {@link ClientHttpResponse} implementation for the Jetty ReactiveStreams HTTP client.
 *
 * @author Sebastien Deleuze
 * @see <a href="https://github.com/jetty-project/jetty-reactive-httpclient">Jetty ReactiveStreams HttpClient</a>
 * @since 5.1
 */
class JettyClientHttpResponse implements ClientHttpResponse {

    private final ReactiveResponse reactiveResponse;

    private final Flux<DataBuffer> content;


    public JettyClientHttpResponse(ReactiveResponse reactiveResponse, Publisher<DataBuffer> content) {
        this.reactiveResponse = reactiveResponse;
        this.content = Flux.from(content);
    }


    @Override
    public HttpStatus getStatusCode() {
        return HttpStatus.valueOf(getRawStatusCode());
    }

    @Override
    public int getRawStatusCode() {
        return this.reactiveResponse.getStatus();
    }

    @Override
    public MultiValueMap<String, ResponseCookie> getCookies() {
        MultiValueMap<String, ResponseCookie> result = new LinkedMultiValueMap<>();
        List<String> cookieHeader = getHeaders().get(HttpHeaders.SET_COOKIE);
        if (cookieHeader != null) {
            cookieHeader.forEach(header -> {
                HttpCookie.parse(header)
                        .forEach(cookie -> result.add(cookie.getName(),
                                ResponseCookie.from(cookie.getName(), cookie.getValue())
                                        .domain(cookie.getDomain())
                                        .path(cookie.getPath())
                                        .maxAge(cookie.getMaxAge())
                                        .secure(cookie.getSecure())
                                        .httpOnly(cookie.isHttpOnly())
                                        .build()));
            });
        }
        return CollectionUtils.unmodifiableMultiValueMap(result);
    }

    @Override
    public Flux<DataBuffer> getBody() {
        return this.content;
    }

    @Override
    public HttpHeaders getHeaders() {
        HttpHeaders headers = new HttpHeaders();
        this.reactiveResponse.getHeaders().stream()
                .forEach(field -> headers.add(field.getName(), field.getValue()));
        return headers;
    }

}
